diff --git a/src/librustc_ast/util/comments.rs b/src/librustc_ast/util/comments.rs
index 543c22f4def05..20d44d5a6a739 100644
--- a/src/librustc_ast/util/comments.rs
+++ b/src/librustc_ast/util/comments.rs
@@ -1,5 +1,3 @@
-pub use CommentStyle::*;
-
 use crate::ast::AttrStyle;
 use crate::token::CommentKind;
 use rustc_span::source_map::SourceMap;
@@ -198,7 +196,7 @@ pub fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comme
 
     if let Some(shebang_len) = rustc_lexer::strip_shebang(text) {
         comments.push(Comment {
-            style: Isolated,
+            style: CommentStyle::Isolated,
             lines: vec![text[..shebang_len].to_string()],
             pos: start_bpos,
         });
@@ -214,7 +212,7 @@ pub fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comme
                     while let Some(next_newline) = &token_text[idx + 1..].find('\n') {
                         idx = idx + 1 + next_newline;
                         comments.push(Comment {
-                            style: BlankLine,
+                            style: CommentStyle::BlankLine,
                             lines: vec![],
                             pos: start_bpos + BytePos((pos + idx) as u32),
                         });
@@ -228,9 +226,9 @@ pub fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comme
                         _ => true,
                     };
                     let style = match (code_to_the_left, code_to_the_right) {
-                        (_, true) => Mixed,
-                        (false, false) => Isolated,
-                        (true, false) => Trailing,
+                        (_, true) => CommentStyle::Mixed,
+                        (false, false) => CommentStyle::Isolated,
+                        (true, false) => CommentStyle::Trailing,
                     };
 
                     // Count the number of chars since the start of the line by rescanning.
@@ -246,7 +244,11 @@ pub fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comme
             rustc_lexer::TokenKind::LineComment => {
                 if line_doc_comment_style(token_text).is_none() {
                     comments.push(Comment {
-                        style: if code_to_the_left { Trailing } else { Isolated },
+                        style: if code_to_the_left {
+                            CommentStyle::Trailing
+                        } else {
+                            CommentStyle::Isolated
+                        },
                         lines: vec![token_text.to_string()],
                         pos: start_bpos + BytePos(pos as u32),
                     })
diff --git a/src/librustc_ast_pretty/pprust.rs b/src/librustc_ast_pretty/pprust.rs
index 243cd24e306e5..9d9ca78de5588 100644
--- a/src/librustc_ast_pretty/pprust.rs
+++ b/src/librustc_ast_pretty/pprust.rs
@@ -10,8 +10,9 @@ use rustc_ast::attr;
 use rustc_ast::ptr::P;
 use rustc_ast::token::{self, BinOpToken, CommentKind, DelimToken, Nonterminal, Token, TokenKind};
 use rustc_ast::tokenstream::{TokenStream, TokenTree};
+use rustc_ast::util::classify;
+use rustc_ast::util::comments::{gather_comments, Comment, CommentStyle};
 use rustc_ast::util::parser::{self, AssocOp, Fixity};
-use rustc_ast::util::{classify, comments};
 use rustc_span::edition::Edition;
 use rustc_span::source_map::{SourceMap, Spanned};
 use rustc_span::symbol::{kw, sym, Ident, IdentPrinter, Symbol};
@@ -50,17 +51,17 @@ impl PpAnn for NoAnn {}
 
 pub struct Comments<'a> {
     sm: &'a SourceMap,
-    comments: Vec<comments::Comment>,
+    comments: Vec<Comment>,
     current: usize,
 }
 
 impl<'a> Comments<'a> {
     pub fn new(sm: &'a SourceMap, filename: FileName, input: String) -> Comments<'a> {
-        let comments = comments::gather_comments(sm, filename, input);
+        let comments = gather_comments(sm, filename, input);
         Comments { sm, comments, current: 0 }
     }
 
-    pub fn next(&self) -> Option<comments::Comment> {
+    pub fn next(&self) -> Option<Comment> {
         self.comments.get(self.current).cloned()
     }
 
@@ -68,9 +69,9 @@ impl<'a> Comments<'a> {
         &mut self,
         span: rustc_span::Span,
         next_pos: Option<BytePos>,
-    ) -> Option<comments::Comment> {
+    ) -> Option<Comment> {
         if let Some(cmnt) = self.next() {
-            if cmnt.style != comments::Trailing {
+            if cmnt.style != CommentStyle::Trailing {
                 return None;
             }
             let span_line = self.sm.lookup_char_pos(span.hi());
@@ -462,9 +463,9 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
         }
     }
 
-    fn print_comment(&mut self, cmnt: &comments::Comment) {
+    fn print_comment(&mut self, cmnt: &Comment) {
         match cmnt.style {
-            comments::Mixed => {
+            CommentStyle::Mixed => {
                 if !self.is_beginning_of_line() {
                     self.zerobreak();
                 }
@@ -483,7 +484,7 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
                 }
                 self.zerobreak()
             }
-            comments::Isolated => {
+            CommentStyle::Isolated => {
                 self.hardbreak_if_not_bol();
                 for line in &cmnt.lines {
                     // Don't print empty lines because they will end up as trailing
@@ -494,7 +495,7 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
                     self.hardbreak();
                 }
             }
-            comments::Trailing => {
+            CommentStyle::Trailing => {
                 if !self.is_beginning_of_line() {
                     self.word(" ");
                 }
@@ -512,7 +513,7 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
                     self.end();
                 }
             }
-            comments::BlankLine => {
+            CommentStyle::BlankLine => {
                 // We need to do at least one, possibly two hardbreaks.
                 let twice = match self.last_token() {
                     pp::Token::String(s) => ";" == s,
@@ -531,7 +532,7 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
         }
     }
 
-    fn next_comment(&mut self) -> Option<comments::Comment> {
+    fn next_comment(&mut self) -> Option<Comment> {
         self.comments().as_mut().and_then(|c| c.next())
     }